4-[difluoro(3,4,5-trifluorophenoxy)methyl]-2',3,5-trifluoro-4''-propyl-1,1':4',1''-terphenyl

Short-term toxicity to fish

Administrative data

Endpoint:

short-term toxicity to fish

Type of information:

experimental study

Adequacy of study:

key study

Study period:

May 5, 2009 - June 16, 2009

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2009

Report date:

2009

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 203 (Fish, Acute Toxicity Test)

Version / remarks:

1992

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method C.1 (Acute Toxicity for Fish)

Version / remarks:

Council Regulation (EC) No. 440/2008 laying down test methods pursuant to Regulation (EC) No. 1907/2006 of the European Parliament and the council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH).

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

4-{4-[difluoro(3,4,5-trifluorophenoxy)methyl]-3,5-difluorophenyl}-3-fluoro-4'-propyl-1,1'-biphenyl

EC Number:

619-490-8

Cas Number:

303186-36-9

Molecular formula:

C27H22F8O2

IUPAC Name:

4-{4-[difluoro(3,4,5-trifluorophenoxy)methyl]-3,5-difluorophenyl}-3-fluoro-4'-propyl-1,1'-biphenyl

Test material form:

solid: bulk

Specific details on test material used for the study:

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
Before exposure of the fish, the test medium (reconstituted water and test material) was freshly prepared. The calibrated flask with test material and vehicle (reconstituted water) was treated in an ultrasonic device for 1 hour. Subsequently, the preparation was aerated and stirred with a magnetic stirrer for further 23 hours. After 24 hours the formulation was given through a nutsch filter (pore size 10 - 16 m). The filtrate was used for the study.

Sampling and analysis

Analytical monitoring:

no

Test solutions

Vehicle:

yes

Details on test solutions:

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
Before exposure of the fish, the test medium (reconstituted water and test material) was freshly prepared. The calibrated flask with test material and vehicle (reconstituted water) was treated in an ultrasonic device for 1 hour. Subsequently, the preparation was aerated and stirred with a magnetic stirrer for further 23 hours. After 24 hours the formulation was given through a nutsch filter (pore size 10 - 16 m). The filtrate was used for the study.

VEHICLE:
For the reconstituted water the following chemicals (analytical grade) were dissolved in fully demineralized water:

Macro nutrients mg/L
CaCl2 x 2H2O 294.00
MgSO4 x 7H2O 123.25
NaHCO3 64.75
KCl 5.75

Before the start of the experimental part the reconstituted water for fish was prepared. After preparation the water was aerated for 24 hours before using it.
The proportion of Ca to Mg ions was 4:1 and that of Na to K ions 10:1. Hardness: about 15° dH (about 267 mg/L CaCO3).

Test organisms

Test organisms (species):

Danio rerio (previous name: Brachydanio rerio)

Details on test organisms:

TEST ORGANISM
- Common name: Zebrafish
- Strain: Dania rerio
- Source: Breeder is Institute of Toxicology, Merck KGaA
- Length at study initiation: 2.0 + 1.0 cm
- Weight at study initiation: Body weight per group: 8.8 g (control group) and 6.6 g (test material group)
- Feeding during test: commercial fish diet during acclimatization

ACCLIMATION
- Acclimation period: The fish were acclimatized to the conditions of the laboratory for more than 14 days and were held in reconstituted water for at least 12 days before testing.
- Acclimation conditions (same as test or not): same
- Health during acclimation (any mortality observed): no

Study design

Test type:

static

Water media type:

freshwater

Limit test:

yes

Total exposure duration:

96 h

Post exposure observation period:

no

Test conditions

Hardness:

about 15° dH (about 267 mg/L CaCO3)

Test temperature:

23 to 25 °C

pH:

7.12 - 7.91

Dissolved oxygen:

62.5% - 91.8%

Salinity:

no data

Nominal and measured concentrations:

Nominal Concentration: 100 mg/L

Details on test conditions:

TEST SYSTEM
- Test vessel: 10L Glass Aquariums
- Type (delete if not applicable): open
- Material, size, headspace, fill volume: Full glas folled with 10L test medium
- Aeration: no
- Type of flow-through (e.g. peristaltic or proportional diluter): static
- No. of organisms per vessel: 10
- No. of vessels per concentration (replicates): 1
- No. of vessels per control (replicates): 1


TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: reconstituted watr according OECD 203
- Total organic carbon: no data
- Particulate matter: no data
- Metals: no data
- Pesticides:no data
- Chlorine: no data
- Alkalinity: no data
- Ca/mg ratio: 4/1
- Culture medium different from test medium: no
- Intervals of water quality measurement: daily

OTHER TEST CONDITIONS
- Adjustment of pH: no
- Photoperiod: 12hrs light / 12hrs dark
- Light intensity: no data

EFFECT PARAMETERS MEASURED (with observation intervals if applicable): mortality, clinical symptoms

TEST CONCENTRATIONS
- Range finding study
- Test concentrations: 100 mg/L
- Results used to determine the conditions for the definitive study: mo mortality observed at 100 mg/L

Reference substance (positive control):

no

Results and discussion

Effect concentrations

Key result

Duration:

96 h

Dose descriptor:

LC50

Effect conc.:

> 100 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

mortality (fish)

Remarks on result:

other: > 0.00021 mg/L

Details on results:

Under the conditions of the present study, an aqueous solution of nominal 100 mg/L of the test item revealed no aquatic toxicity in the test system.


The 48h EC50 exceeded the water solubility of 0.00021 mg/L (nominal >100 mg/L) and, thus, could not be determined in this study.


- Behavioural abnormalities: no
- Observations on body length and weight: no
- Other biological observations: no
- Mortality of control: no
- Other adverse effects control: no
- Abnormal responses: no
- Any observations (e.g. precipitation) that might cause a difference between measured and nominal values: no
- Effect concentrations exceeding solubility of substance in test medium: yes

Applicant's summary and conclusion

Validity criteria fulfilled:

yes

Conclusions:

An aqueous solution of the test item with a nominal concentration of 100 mg/L revealed no aquatic toxicity in the test system. The 96h LC50 value for zebrafish exceeded the maximal solubility of the test material in reconstituted water and, thus, could not be determined in this test.

Executive summary:

The test was performed according to OECD 203. An aqueous solution of the test item with a nominal concentration of 100 mg/L revealed no aquatic toxicity in the test system. The 96 h LC₅₀ value for zebrafish exceeded the maximal solubility of the test material in reconstituted water and, thus, could not be determined in this test.